Bug #73412 --> land new message display code.

sr=sspitzer

mailnews/base/resources/content/mail3PaneWindowVertLayout.xul

@@ -150,7 +150,7 @@ Rights Reserved.
       </splitter>
       <!-- msg header view -->
       <box id="messagepanebox" orient="vertical" flex="4" persist="collapsed height" class="window-focusborder" focusring="false">
-        <toolbox id="msgHeaderView"/>
+        <box id="msgHeaderView"/>
     
         <!-- message view -->
         <browser id="messagepane" context="messagePaneContext" style="height: 0px" flex="1" name="messagepane" type="content-primary" src="about:blank" onclick="contentAreaClick(event);" ondraggesture="nsDragAndDrop.startDrag(event, contentAreaDNDObserver);"/>

mailnews/base/resources/content/messageWindow.xul

@@ -103,7 +103,7 @@ Rights Reserved.
   
   <!-- msg header view -->
   <box id="messagepanebox" align="vertical" flex="3" persist="collapsed">
-    <toolbox id="msgHeaderView"/>
+    <box id="msgHeaderView"/>
 
     <!-- message view -->
     <browser id="messagepane" context="messagePaneContext" style="height: 0px" flex="1" name="messagepane" type="content-primary" src="about:blank" onclick="contentAreaClick(event);" ondraggesture="nsDragAndDrop.startDrag(event, contentAreaDNDObserver);"/>

mailnews/base/resources/content/messenger.xul

@@ -152,7 +152,7 @@ Rights Reserved.
       </splitter>
       
       <box id="messagepanebox" align="vertical" flex="3" persist="collapsed height" class="window-focusborder" focusring="false" onclick="contentAreaClick(event);" ondraggesture="nsDragAndDrop.startDrag(event, contentAreaDNDObserver);">
-        <toolbox id="msgHeaderView"/>
+        <box id="msgHeaderView"/>
     
         <browser id="messagepane" context="messagePaneContext" style="height: 0px" flex="1" name="messagepane" type="content-primary" src="about:blank"/>
       </box>